package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

/**
 * @author ljj
 * @create 2022-11-16-17:11
 */
@RestController
@Slf4j
@RequestMapping("/common")
public class CommonController {
    @Value("${reggie.path}")
    private String basePath;
    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){
        log.info("file {}",file);
        String originalFilename = file.getOriginalFilename();
        String filename = UUID.randomUUID().toString()+originalFilename.substring(originalFilename.lastIndexOf('.'));
        File file1 = new File(basePath);
        if (!file1.exists()){
            file1.mkdir();
        }
        try {
            file.transferTo(new File(basePath+filename));
        } catch (IOException e) {
            return R.error("失败");
        }
        return R.success(filename);
    }
    @GetMapping("/download")
    public void download(String name, HttpServletResponse httpServletResponse){
        try( FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));
             ServletOutputStream outputStream = httpServletResponse.getOutputStream();) {

            int lens =0;
            byte [] bytes =new byte[1024];
            while ((lens =fileInputStream.read(bytes)) !=-1){
                outputStream.write(bytes,0,lens);
                outputStream.flush();
            }
            httpServletResponse.setContentType("image/jpeg");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }



    }
}
